ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

Increase A
Decrease B
Remain constant C
None of these D

Question # 2

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

Along the tangent A
Towards the centre B
Away from the centre C
None of them D

Question # 3

When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:

Along the tangent A
Toward the centre B
Away from the centre C
None of them D

Question # 4

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

49 rad/sec² A
1 rad/sec² B
0.16 rev/sec² C
Both A and C D
Both B and C E

Question # 5

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

5 rad/sec² A
-10 rev/sec² B
-10 rad/sec² C
-5 rev/sec² D

Question # 6

When a body moves with a constant speed in a circle:

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 7

Moment of inertia depends upon:

Mass A
Selection of axis of rotation B
Both of them C
None of these D

Question # 8

One radian is:

Greater than one degree A
Less than one degree B
Equal to one degree C
None of these D

Question # 9

Direction of motion _______ in circular motion

Changes off and on A
Changes continuously B
Does not change C
None of them D

Question # 10

A body can have constant velocity when it follows:

A circular path A
A rectilinear path B
Trajectory of a projectile C
None of these D

Question # 11

Radian is defined as the angle subtended at the center of a circle by an arc of:

Length equal to its diameter A
Length equal to its radius B
Any length C
None of these D

Question # 12

Centripetal acceleration is also called ________ acceleration

Tangential A
Radial B
Angular C
None of these D

Question # 13

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 14

The useful unit of angular replacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 15

Conventional the angular Velocity is Directed at an angle of:

90° to the axis of rotation A
30° to the axis of rotation B
0° to the axis of rotation C
None of above D

Question # 16

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 17

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

38 m/sec A
3.8 m/sec B
0.6 m/sec C
None of these D

Question # 18

Satellites are held in orbits around Earth by its:

Gravitational field A
Magnetic field B
Own orbital motion C
Own spin motion D

Question # 19

Which of the following pairs does not have identical dimensions?

Torque and energy A
Energy and work B
Momentum and impulse C
Mass and moment of inertia D

Question # 20

Angular velocity is a:

Scalar quantity A
Vector quantity B
Complex quantity C
None of these D

Question # 21

A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.
if centripetal acceleration is 9.8 m/sec², then its angular velocity in rad/sec is:

22/7 A
7 B
14 C
21 D

Question # 22

One radian is

Greater than one degree A
Less than one degree B
Equal to one degree C
None of these D

Question # 23

Direction of motion _________ in circular motion

Changes off and on A
Changes continously B
Does not change C
None of them D

Question # 24

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

8.1 X 10⁷N A
625 N B
6250 N C
None of these D

Question # 25

Angular momentum is a:

vector quantity A
Imaginary quantity B
Complex Quantity C
Scalar Quantity D

Question # 26

Which one is related to angular motion:

Moment of a force A
Moment of inertia B
Moment of momentum C
None of these D

Question # 27

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 28

One radian is:

Greater than one degree A
Less than one degree B
Equal to one degree C
None of them D

Question # 29

When a body moves with a constant speed in a circle:

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 30

Direction of motion_______ in circular of motion:

Changes off and on A
Changes continuously B
Does not change C
None of them D

Sr.#	Question	Answer
1	Centripetal acceleration is also called ______ acceleration	A. Tangential B. Radial C. Angular D. None of them
2	Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.	A. Greater than B. smaller than C. Equal to D. None of these
3	When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:	A. Along the tangent B. Toward the centre C. Away from the centre D. None of them
4	Centripetal acceleration is also called ________ acceleration	A. Tangential B. Radial C. Angular D. None of these
5	Circular motion is an example of motion in:	A. One dimension B. Two dimensions C. Three dimensions D. None of these
6	______ plays the same role during angular motion as played by the mass in linear motion	A. Torque B. Angular Momentum C. Moment of a force D. Moment of inertia
7	Angular velocity is a:	A. Scalar quantity B. Vector quantity C. Complex quantity D. None of these
8	A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:	A. 38 m/sec B. 3.8 m/sec C. 0.6 m/sec D. None of these
9	The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:	A. 980 N B. 580 N C. 1380 N D. Zero
10	Which one is related to angular motion:	A. Moment of a force B. Moment of inertia C. Moment of momentum D. None of these

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ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 5 Circular Motion

ECAT Pre General Science Physics Chapter 5 Circular Motion

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

When a body moves with a constant speed in a circle:

Moment of inertia depends upon:

One radian is:

Direction of motion _______ in circular motion

A body can have constant velocity when it follows:

Radian is defined as the angle subtended at the center of a circle by an arc of:

Centripetal acceleration is also called ________ acceleration

When angular acceleration is positive, the body rotates:

The useful unit of angular replacement in SI unit is:

Conventional the angular Velocity is Directed at an angle of:

When angular acceleration is positive, the body rotates:

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

Satellites are held in orbits around Earth by its:

Which of the following pairs does not have identical dimensions?

Angular velocity is a:

A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.if centripetal acceleration is 9.8 m/sec2, then its angular velocity in rad/sec is:

One radian is

Direction of motion _________ in circular motion

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

Angular momentum is a:

Which one is related to angular motion:

One radian is equal to:

One radian is:

When a body moves with a constant speed in a circle:

Direction of motion_______ in circular of motion:

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A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.
if centripetal acceleration is 9.8 m/sec², then its angular velocity in rad/sec is: